trivial: debian: read /etc/lsb-release instead of dpkg-dev (Closes: #977860, #977861, #970783)
trivial: debian: read /etc/lsb-release instead of dpkg-dev (Closes: #977860, #977861, #970783)

hughsie/fwupd,hughsie/fwupd,fwupd/fwupd,hughsie/fwupd,fwupd/fwupd,hughsie/fwupd,fwupd/fwupd,fwupd/fwupd